I would say the primary reason that windows still is acceptable is familiarity and games. Nothing else.

Non tech people don't care about control panel etc. they just go through the pain of entering the WiFi password. Done.

- gamers. Double click install - go on. I know very few gamers that have moved to Linux.

And corporate. Most normies that I know DON'T have own computers. Everything can be done via smartphone these days.